All the red tides have dissipated. No associated death of fish has been reported by mariculturists so far.

"The red tide at Clear Water Bay First Beach was formed by Noctiluca scintillans while the one at Yim Tin Tsai Fish Culture Zone was formed by Heterosigma akashiwo. Both species are common in Hong Kong waters and non-toxic. The red tide at Tai Tau Chau Fish Culture Zone was formed by Ceratium furca, Ceratium tripos and Chattonella marina. Ceratium furca and Ceratium tripos are non-toxic while Chattonella marina is toxic and associated with fish kill in Hong Kong. Nevertheless, no associated dead fish was reported," a spokesman for the working group said.

Red tide is a natural phenomenon. The AFCD's proactive phytoplankton monitoring programme will continue monitoring red tide occurrences to minimise the impact on the mariculture industry and the public.